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Acetaldoxime : ウィキペディア英語版 | Acetaldoxime
Acetaldoxime is the chemical compound with formula C2H5NO. It is one of the simplest oxime-containing compounds, and has a wide variety of uses in chemical synthesis. ==Properties== Acetaldoxime will often appear as a colorless liquid, or a white solid. Its solid can form two different crystallize modifications with needle-like structures, one melting at approximately 44°C-47°C for the alpha form, and 12°C for the beta form. The liquid is known to have a pungent odor, and is highly flammable. The compound can act as both an acid or a base, due to its acidic proton on the hydroxyl group and the basic nitrogen atom. The compound exists as a mixture of its Z and E stereoisomers (i.e. syn and anti, or cis and trans) in its normal form. The E stereoisomer can be isolated by slow crystallization of a distilled E/Z mixture.〔〔http://www.theodora.com/encyclopedia/o/oximes.html〕
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